Tectonica (http://tectonica.co/) created its own fully responsive web app and put it online for everyone to use for free! The idea behind the web application came from the constant scheduling of meetings we do here with clients around the world. We found a great lack of any highly-usable and well-designed applications to easily assist with scheduling meetings in other time zones. Now you can coordinate meeting times easily with people located all over the world from any desktop or mobile device.